Water Information Reporting
Copyright © Government of Western Australia
Information supplied by the Department of Water and Environmental Regulation is protected by the Copyright Act 1968. That copyright belongs to the State of Western Australia.
Apart from any fair dealing for the purpose of private study, research, criticism or review, as permitted under the Copyright Act 1968, no part may be
reproduced or reused for any purpose without the written permission of the Department of Water and Environmental Regulation. Please click on the Copyright
link for full details.
Disclaimer / limitation of liability
The information contained herein is provided by the Department of Water and Environmental Regulation in good faith as a public service.
However, the Department does not guarantee the accuracy of this information, and it is the responsibility of recipients to make their own enquiries
as to its accuracy, currency and appropriateness. Telemetered data is provisional only and has not been verified for accuracy. If any aspect of this information is of significance to you, you should
discuss your particular circumstances with the Department. Please click on the Disclaimer
link for full details.
Should you require further information or technical assistance, please contact one of our water information officers.
Department of Water and Environmental Regulation HYMONTH V128 Output 13/08/2026
Site 611226 Preston River - Donnybrook Dawson Rd Site 611226
VarFrom 10.00 Stage - SL in Metres
VarTo 140.00 Mean Stream Discharge in Cubic Metres/Second
Figures are for period ending 24:00
Mean Median Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Monthly Monthly Days Yr
2019 [ ] [ ] [ ] [ ] [0.059] 0.258$ 0.912$ 1.010$ 3.713$ 0.236$ 0.083& 0.063$ [0.792] [0.247] 148 2019
2020 0.069$ 0.067$ 0.053$ 0.034$ 0.042$ 0.537$ 5.306" 3.520" 5.371& 0.766$ 0.230$ 0.046$ 1.337& 0.149& 0 2020
2021 0.071$ 0.094$ 0.082$ 0.081$ 0.170$ 1.021$ 9.169# 8.297" 3.566" 2.583$ 0.423$ 0.067$ 2.135$ 0.297$ 0 2021
2022 0.030& 0.043& 0.039$ 0.022& 0.038& 0.111$ 3.159$ 7.881" 1.310$ 0.324$ 0.100$ 0.055& 1.093& 0.077& 0 2022
2023 0.060$ 0.067$ 0.058$ 0.057$ 0.033& 0.058$ 0.366$ 2.906$ 1.720$ 0.256$ 0.038& 0.067& 0.474& 0.063& 0 2023
2024 0.099$ 0.029& 0.028& 0.009& 0.017& 0.118$ 1.216$ 8.875# 2.315$ 0.453$ 0.448^ 0.027^ 1.136^ 0.109^ 0 2024
2025 0.012^ 0.028& 0.020& 0.029& 0.018& 0.060$ 3.356$ 10.65 # 6.100# 0.742$ 0.143$ 0.034& 1.766^ 0.047^ 0 2025
2026 0.033& 0.030^ 0.022^ 0.023^ 0.026$ 0.240$ 1.664$ [1.155] [ ] [ ] [ ] [ ] [0.399] [0.032] 142 2026
290 Total
Mean 0.053^ 0.051^ 0.043^ 0.037^ [0.051] 0.300$ 3.144$ [5.537] 3.442& 0.766$ 0.209^ 0.051^ [1.142] Mean
Med. 0.060^ 0.043^ 0.039^ 0.029^ [0.036] 0.179$ 2.412$ [5.701] 3.566& 0.453$ 0.143^ 0.055^ [0.089] Med.
Max 0.099^ 0.094^ 0.082^ 0.081^ [0.170] 1.021$ 9.169$[10.65 ] 6.100& 2.583$ 0.448^ 0.067^ [2.135] Max
Min 0.012^ 0.028^ 0.020^ 0.009^ [0.017] 0.058$ 0.366$ [1.010] 1.310& 0.236$ 0.038^ 0.027^ [0.399] Min
OK 100% 100% 100% 100% 89% 100% 100% 92% 100% 100% 100% 100% 98% OK
Cnt 7 7 7 7 8 8 8 8 7 7 7 7 8 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
" ... Relative Uncertainty +/-10%
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available
^ ... Relative Uncertainty +/-50%
Department of Water and Environmental Regulation HYMONTH V128 Output 13/08/2026
Site 611226 Preston River - Donnybrook Dawson Rd Site 611226
VarFrom 10.00 Stage - SL in Metres
VarTo 140.00 Maximum Stream Discharge in Cubic Metres/Second
Figures are for period ending 24:00
Annual Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Max Days Yr
2019 [ ] [ ] [ ] [ ] [0.070] 1.098$ 1.924$ 12.63 $ 19.93 $ 0.540$ 0.218& 0.117$ [19.93 ] 148 2019
2020 0.121$ 0.113$ 0.101$ 0.053$ 0.110$ 4.145$ 19.31 " 8.500" 32.60 & 3.139$ 0.452$ 0.112$ 32.60 & 0 2020
2021 0.125$ 0.174$ 0.160$ 0.211$ 1.129$ 2.549$ 29.18 # 25.56 " 7.009" 7.237$ 1.412$ 0.128$ 29.18 $ 0 2021
2022 0.087& 0.138& 0.098$ 0.063& 0.220& 0.272$ 16.57 $ 18.39 " 2.472$ 0.705$ 0.214$ 0.148& 18.39 & 0 2022
2023 0.155$ 0.138$ 0.101$ 0.113$ 0.059& 0.127$ 1.034$ 12.64 $ 6.957$ 0.793$ 0.121& 0.158& 12.64 & 0 2023
2024 0.198$ 0.164& 0.058& 0.047& 0.087& 0.247$ 7.268$ 29.51 # 8.805$ 1.833$ 7.299^ 0.322^ 29.51 ^ 0 2024
2025 0.039^ 0.080& 0.053& 0.107& 0.053& 0.121$ 13.54 $ 31.89 # 14.50 # 1.613$ 0.303$ 0.098& 31.89 ^ 0 2025
2026 0.059& 0.064^ 0.095^ 0.048^ 0.097$ 1.702$ 6.792$ [2.339] [ ] [ ] [ ] [ ] [6.792] 142 2026
290 Total
Mean 0.112^ 0.124^ 0.095^ 0.092^ [0.228] 1.283$ 11.95 $[17.68 ] 13.18 & 2.266$ 1.431^ 0.155^ [22.62 ] Mean
Med. 0.121^ 0.138^ 0.098^ 0.063^ [0.092] 0.685$ 10.40 $[15.51 ] 8.805& 1.613$ 0.303^ 0.128^ Med.
Max 0.198^ 0.174^ 0.160^ 0.211^ [1.129] 4.145$ 29.18 $[31.89 ] 32.60 & 7.237$ 7.299^ 0.322^ [32.60 ] Max
Min 0.039^ 0.064^ 0.053^ 0.047^ [0.053] 0.121$ 1.034$ [2.339] 2.472& 0.540$ 0.121^ 0.098^ [6.792] Min
OK 100% 100% 100% 100% 89% 100% 100% 92% 100% 100% 100% 100% 98% OK
Cnt 7 7 7 7 8 8 8 8 7 7 7 7 8 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
" ... Relative Uncertainty +/-10%
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available
^ ... Relative Uncertainty +/-50%
Department of Water and Environmental Regulation HYMONTH V128 Output 13/08/2026
Site 611226 Preston River - Donnybrook Dawson Rd Site 611226
VarFrom 10.00 Stage - SL in Metres
VarTo 140.00 Minimum Stream Discharge in Cubic Metres/Second
Figures are for period ending 24:00
Annual Missing
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Min Days Yr
2019 [ ] [ ] [ ] [ ] [0.049] 0.038$ 0.395$ 0.272$ 0.353$ 0.101$ 0.010& 0.021$ [0.010] 148 2019
2020 0.029$ 0.027$ 0.021$ 0.015$ 0.016$ 0.039$ 1.370" 1.121" 1.173& 0.142$ 0.075$ 0.014$ 0.014& 0 2020
2021 0.019$ 0.047$ 0.043$ 0.040$ 0.053$ 0.351$ 1.649# 2.356" 1.837" 0.909$ 0.062$ 0.018$ 0.018$ 0 2021
2022 0.002& 0.008& 0.019$ 0.008& 0.004& 0.026$ 0.144$ 1.436" 0.683$ 0.147$ 0.035$ 0.007& 0.002& 0 2022
2023 0.017$ 0.025$ 0.028$ 0.024$ 0.010& 0.019$ 0.045$ 0.616$ 0.452$ 0.057$ 0.000& 0.011& 0.000& 0 2023
2024 0.037$ 0.000& 0.002& 0.000& 0.002& 0.017$ 0.064$ 2.729# 0.448$ 0.093$ 0.005^ 0.000^ 0.000^ 0 2024
2025 0.000^ 0.009& 0.004& 0.000& 0.009& 0.017$ 0.050$ 3.823# 1.446# 0.230$ 0.052$ 0.011& 0.000^ 0 2025
2026 0.015& 0.009^ 0.004^ 0.009^ 0.018$ 0.050$ 0.540$ [0.793] [ ] [ ] [ ] [ ] [0.004] 142 2026
290 Total
Mean 0.017^ 0.018^ 0.017^ 0.014^ [0.020] 0.070$ 0.532$ [1.643] 0.913& 0.240$ 0.034^ 0.012^ [0.006] Mean
Med. 0.017^ 0.009^ 0.019^ 0.009^ [0.013] 0.032$ 0.269$ [1.278] 0.683& 0.142$ 0.035^ 0.011^ Med.
Max 0.037^ 0.047^ 0.043^ 0.040^ [0.053] 0.351$ 1.649$ [3.823] 1.837& 0.909$ 0.075^ 0.021^ [0.018] Max
Min 0.000^ 0.000^ 0.002^ 0.000^ [0.002] 0.017$ 0.045$ [0.272] 0.353& 0.057$ 0.000^ 0.000^ [0.000] Min
OK 100% 100% 100% 100% 89% 100% 100% 92% 100% 100% 100% 100% 98% OK
Cnt 7 7 7 7 8 8 8 8 7 7 7 7 8 Cnt
------------------ Notes -------------------
All recorded data is continuous and reliable
except where the following tags are used...
" ... Relative Uncertainty +/-10%
# ... Relative Uncertainty +/-15%
$ ... Relative Uncertainty +/-20%
& ... Relative Uncertainty +/-30%
[ ... Not Available
^ ... Relative Uncertainty +/-50%